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Ugolnaya Bay 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Ugolnaya Bay

Russia

Long range weather outlook for Ugolnaya Bay includes 14 day forecast summary:

The forecast for Ugolnaya Bay in the coming two weeks is predicting the average daytime maximum temperature will be around -6°C, with a high for the two weeks of 1°C expected on the afternoon of Thursday 12th. The average minimum temperature will be -18°C, dipping to its lowest on the morning of Tuesday 17th at -21°C. Expect the next 14 days remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 11
Mar
15:00

SSW
SSW

2 / 2 mph 26 / 24°F 86% 1036 mb
Low level cloud: 1%
Mid level cloud: 32%
High level cloud: 35%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

3 / 6 mph 16 / 12°F 94% 1034 mb
Low level cloud: 4%
Mid level cloud: 20%
High level cloud: 72%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

6 / 13 mph 9 / -1°F 98% 1032 mb
Low level cloud: 22%
Mid level cloud: 44%
High level cloud: 90%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 12
Mar
00:00

WSW
WSW

8 / 16 mph 15 / 5°F 95% 1029 mb
Low level cloud: 16%
Mid level cloud: 100%
High level cloud: 9%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

3 / 6 mph 18 / 13°F 96% 1027 mb
Low level cloud: 93%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

6 / 14 mph 12 / 2°F 98% 1027 mb
Low level cloud: 15%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

8 / 16 mph 17 / 7°F 93% 1027 mb
Low level cloud: 6%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

14 / 19 mph 34 / 24°F 74% 1028 mb
Low level cloud: 13%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

24 / 31 mph 33 / 21°F 71% 1028 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

22 / 34 mph 28 / 14°F 72% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

16 / 28 mph 25 / 12°F 71% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 13
Mar
00:00

W
W

11 / 23 mph 14 / 1°F 80% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

19 / 34 mph 22 / 7°F 70% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

19 / 31 mph 20 / 4°F 73% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

11 / 24 mph 15 / 2°F 80% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

16 / 25 mph 22 / 8°F 68% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

13 / 23 mph 20 / 7°F 72% 1032 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

11 / 24 mph 9 / -5°F 81% 1033 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

10 / 21 mph 5 / -10°F 84% 1035 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 14
Mar
00:00

W
W

7 / 15 mph 0 / -12°F 90% 1035 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 2%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

6 / 13 mph -1 / -13°F 91% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

6 / 12 mph -2 / -14°F 91% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

6 / 12 mph 2 / -8°F 88% 1037 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

7 / 9 mph 16 / 6°F 77% 1038 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 9%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

9 / 11 mph 17 / 6°F 83% 1039 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

8 / 18 mph 2 / -13°F 93% 1041 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

6 / 14 mph -4 / -17°F 97% 1042 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 15
Mar
00:00

W
W

6 / 12 mph -4 / -16°F 97% 1042 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

5 / 10 mph -2 / -12°F 94% 1041 mb
Low level cloud: 0%
Mid level cloud: 95%
High level cloud: 53%
Most Significant Cloud Type: medium
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

5 / 10 mph 0 / -11°F 91% 1040 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 47%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

4 / 9 mph 10 / 2°F 83% 1040 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

3 / 3 mph 21 / 17°F 79% 1039 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 22%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

3 / 4 mph 23 / 18°F 87% 1038 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

4 / 9 mph 10 / 2°F 97% 1038 mb
Low level cloud: 7%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

5 / 11 mph 2 / -9°F 99% 1039 mb
Low level cloud: 25%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 16
Mar
00:00

WNW
WNW

5 / 10 mph 1 / -9°F 99% 1038 mb
Low level cloud: 48%
Mid level cloud: 8%
High level cloud: 22%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

5 / 10 mph 3 / -7°F 99% 1038 mb
Low level cloud: 83%
Mid level cloud: 9%
High level cloud: 22%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

5 / 10 mph 4 / -5°F 99% 1038 mb
Low level cloud: 71%
Mid level cloud: 10%
High level cloud: 4%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

6 / 7 mph 13 / 4°F 98% 1038 mb
Low level cloud: 77%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

6 / 7 mph 19 / 11°F 94% 1038 mb
Low level cloud: 77%
Mid level cloud: 10%
High level cloud: 21%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

7 / 8 mph 20 / 11°F 93% 1037 mb
Low level cloud: 61%
Mid level cloud: 10%
High level cloud: 33%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

6 / 14 mph -1 / -14°F 100% 1037 mb
Low level cloud: 49%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

6 / 13 mph -3 / -16°F 100% 1037 mb
Low level cloud: 58%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 17
Mar
00:00

WNW
WNW

6 / 14 mph -4 / -18°F 99% 1037 mb
Low level cloud: 55%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

7 / 14 mph -5 / -18°F 99% 1037 mb
Low level cloud: 56%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

7 / 14 mph -5 / -19°F 99% 1037 mb
Low level cloud: 47%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

6 / 13 mph 3 / -8°F 99% 1036 mb
Low level cloud: 47%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

5 / 6 mph 19 / 12°F 93% 1036 mb
Low level cloud: 53%
Mid level cloud: 3%
High level cloud: 16%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

3 / 4 mph 20 / 16°F 92% 1034 mb
Low level cloud: 35%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

4 / 8 mph 4 / -4°F 98% 1033 mb
Low level cloud: 17%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

5 / 10 mph 2 / -8°F 98% 1032 mb
Low level cloud: 9%
Mid level cloud: 100%
High level cloud: 99%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 18
Mar
00:00

WNW
WNW

6 / 12 mph -4 / -17°F 98% 1030 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
06:00

W
W

5 / 10 mph 2 / -8°F 99% 1024 mb
Low level cloud: 51%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.0 In
12:00

N
N

9 / 11 mph 18 / 7°F 92% 1024 mb
Low level cloud: 69%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
76%
0.0 In
18:00

NNW
NNW

8 / 17 mph 1 / -13°F 97% 1026 mb
Low level cloud: 15%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.0 In
Thu 19
Mar
00:00

E
E

5 / 7 mph 12 / 4°F 97% 1026 mb
Low level cloud: 100%
Mid level cloud: 70%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

WNW
WNW

3 / 6 mph -10 / -18°F 100% 1025 mb
Low level cloud: 65%
Mid level cloud: 13%
High level cloud: 98%
Most Significant Cloud Type: low
80%
0.0 In
12:00

SSW
SSW

4 / 5 mph 28 / 23°F 90% 1020 mb
Low level cloud: 35%
Mid level cloud: 2%
High level cloud: 39%
Most Significant Cloud Type: low
40%
0.0 In
18:00

WNW
WNW

3 / 5 mph 16 / 10°F 98% 1023 mb
Low level cloud: 24%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.0 In
Fri 20
Mar
00:00

WSW
WSW

4 / 6 mph 24 / 19°F 93% 1016 mb
Low level cloud: 56%
Mid level cloud: 80%
High level cloud: 32%
Most Significant Cloud Type: low
87%
0.0 In
06:00

NW
NW

5 / 10 mph 1 / -9°F 99% 1023 mb
Low level cloud: 95%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
12:00

WNW
WNW

2 / 2 mph 28 / 28°F 90% 1018 mb
Low level cloud: 43%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
48%
0.0 In
18:00

WNW
WNW

5 / 11 mph 5 / -5°F 98% 1023 mb
Low level cloud: 64%
Mid level cloud: 1%
High level cloud: 7%
Most Significant Cloud Type: low
65%
0.0 In
Sat 21
Mar
00:00

WSW
WSW

6 / 12 mph 11 / 1°F 98% 1019 mb
Low level cloud: 11%
Mid level cloud: 1%
High level cloud: 3%
Most Significant Cloud Type: low
11%
0.0 In
06:00

W
W

4 / 8 mph 0 / -8°F 100% 1024 mb
Low level cloud: 77%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
80%
0.0 In
12:00

W
W

3 / 3 mph 27 / 24°F 84% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

SSE
SSE

10 / 18 mph 25 / 15°F 95% 1019 mb
Low level cloud: 33%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
60%
0.0 In
Sun 22
Mar
00:00

W
W

5 / 11 mph 5 / -5°F 98% 1023 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

SSE
SSE

19 / 39 mph 27 / 13°F 97% 1004 mb
Low level cloud: 84%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
90%
0.3 In
12:00

N
N

3 / 4 mph 23 / 18°F 92% 1026 mb
Low level cloud: 47%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
47%
0.0 In
18:00

SSW
SSW

21 / 25 mph 33 / 20°F 78% 1003 mb
Low level cloud: 26%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.0 In
Mon 23
Mar
00:00

WSW
WSW

3 / 5 mph 18 / 13°F 96% 1026 mb
Low level cloud: 71%
Mid level cloud: 6%
High level cloud: 3%
Most Significant Cloud Type: low
73%
0.0 In
06:00

S
S

12 / 24 mph 22 / 10°F 91% 1000 mb
Low level cloud: 12%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
12:00

NNE
NNE

3 / 4 mph 31 / 28°F 92% 1023 mb
Low level cloud: 100%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

5 / 11 mph 17 / 10°F 93% 1001 mb
Low level cloud: 9%
Mid level cloud: 17%
High level cloud: 14%
Most Significant Cloud Type: low
16%
0.0 In
Tue 24
Mar
00:00

NNW
NNW

12 / 13 mph 19 / 6°F 96% 1022 mb
Low level cloud: 77%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
06:00

W
W

6 / 12 mph 10 / 1°F 100% 1005 mb
Low level cloud: 39%
Mid level cloud: 22%
High level cloud: 10%
Most Significant Cloud Type: low
47%
0.0 In
12:00

NNW
NNW

14 / 17 mph 17 / 3°F 87% 1023 mb
Low level cloud: 83%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
86%
0.0 In
18:00

ESE
ESE

4 / 5 mph 26 / 21°F 94% 1004 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 11%
Most Significant Cloud Type: low
100%
0.0 In
Wed 25
Mar
00:00

WSW
WSW

6 / 12 mph -5 / -17°F 99% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

NNW
NNW

9 / 11 mph 26 / 17°F 97% 1002 mb
Low level cloud: 90%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
12:00

WSW
WSW

2 / 2 mph 29 / 29°F 67% 1018 mb
Low level cloud: 62%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
18:00

NW
NW

9 / 17 mph 13 / 2°F 93% 1007 mb
Low level cloud: 83%
Mid level cloud: 98%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.0 In
Thu 26
Mar
00:00

WNW
WNW

6 / 13 mph -3 / -16°F 99% 1023 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 30%
Most Significant Cloud Type: medium
25%
0.0 In
06:00

NNW
NNW

7 / 12 mph 15 / 5°F 96% 1007 mb
Low level cloud: 84%
Mid level cloud: 87%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

11 / 12 mph 34 / 26°F 86% 1014 mb
Low level cloud: 10%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

NE
NE

12 / 16 mph 22 / 11°F 87% 1009 mb
Low level cloud: 91%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure